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Casual vacancies in the Dewan Undangan Negeri (state legislative assembly) are filled by by-elections, which may occur when a member of the Dewan Undangan Negeri dies, resigns or for some other reason. Members of the Dewan Undangan Negeri normally tender the resignation to the Speaker. The Speaker has a discretion as to when to call a by-election and may not call one at all, for example, if a general election or a state election is imminent.

Brackets around a date indicate that the candidate was unopposed when nominations closed. These candidates were declared "elected unopposed" with effect from the date of the closing of nominations, and there was no need to hold a by-election.

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Mahkota	Johor	28 September 2024	Sharifah Azizah Syed Zain		BN (UMNO)	Syed Hussein Syed Abdullah		BN (UMNO)	Death (internal bleeding)
Nenggiri	Kelantan	17 August 2024	Mohd Azizi Abu Naim		Independent	Mohd Azmawi Fikri Abdul Ghani		BN (UMNO)	Disqualification (change of political allegiance)
Sungai Bakap	Penang	6 July 2024	Nor Zamri Latiff		PN (PAS)	Abidin Ismail		PN (PAS)	Death (Inflammation of stomach)
Kuala Kubu Baharu	Selangor	11 May 2024	Lee Kee Hiong		PH (DAP)	Pang Sock Tao		PH (DAP)	Death (ovarian cancer)
Jepak	Sarawak	4 November 2023	Talib Zulpilip		GPS (PBB)	Iskandar Turkee		GPS (PBB)	Death (kidney complications)
Pelangai	Pahang	7 October 2023	Johari Harun		BN (UMNO)	Amizar Abu Adam		BN (UMNO)	Death (plane crash) in Elmina, Selangor.
Simpang Jeram	Johor	9 September 2023	Salahuddin Ayub		PH (AMANAH)	Nazri Abdul Rahman		PH (AMANAH)	Death (Brain hemorrhage)
Belantek	Kedah	Cancelled	Mohd Isa Shafie		PN (PAS)	—			Death (Pneumonia, Endocarditis and Pyelonephritis). However, SPR did not hold a by-election.
Bertam	Penang		Khaliq Mehtab Mohd Ishaq		PN (BERSATU)	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Seberang Jaya			Afif Bahardin		PN (BERSATU)	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Sungai Acheh			Zulkifli Ibrahim		PN (BERSATU)	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Telok Bahang			Zolkifly Mohd Lazim		PN (BERSATU)	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Batang Kali	Selangor		Harumaini Omar		PEJUANG	—			Declared vacant by the Speaker due to long absence without the leave of the Speaker. However, SPR did not hold a by-election.
Gurun	Kedah		Johari Abdul		PH (PKR)	—			Resignation on appointment as Speaker of Dewan Rakyat. However, SPR did not hold a by-election.
Tioman	Pahang	7 December 2022	Mohd Johari Hussain		BN (UMNO)	Mohd Johari Hussain		BN (UMNO)	The election was postponed from the original date because of the death of one of the candidates after the nomination day.

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Kempas	Johor	Cancelled	Osman Sapian		PN (BERSATU)	—			Death (stroke)
Baleh	Sarawak		James Jemut Masing		GPS (PRS)	—			Death (heart attack)
Melor	Kelantan		Md Yusnan Yusof		PN (PAS)	—			Death (heart attack)
Bugaya	Sabah	19 November 2022	Manis Muka Mohd Darah		WARISAN	Jamil Hamzah		WARISAN	Death (kidney ailment)
Slim	Perak	29 August 2020 (2020-August-29)	Mohd. Khusairi Abdul Talib		BN (UMNO)	Mohd Zaidi Aziz		BN (UMNO)	Death (heart attack)
Chini	Pahang	4 July 2020 (2020-July-04)	Abu Bakar Harun			Mohd Sharim Md Zain			Death (heart attack)
Pujut	Sarawak	Cancelled	Ting Tiong Choon		PH (DAP)	—			Declared vacant by the Federal Court based on having dual citizenship decision to declare disqualification. However, SPR did not hold a by-election.
Rantau	Negeri Sembilan	13 April 2019 (2019-April-13)	Mohamad Hasan		BN (UMNO)	Mohamad Hasan		BN (UMNO)	Uncontested election nullified (Election petition)
Semenyih	Selangor	2 March 2019 (2019-03-02)	Bakhtiar Mohd Nor		PH (BERSATU)	Zakaria Hanafi			Death (heart Attack)
Seri Setia		8 September 2018 (2018-09-08)	Shaharuddin Badaruddin		PH (PKR)	Halimey Abu Bakar		PH (PKR)	Death (colon cancer)
Balakong			Eddie Ng Tien Chee		PH (DAP)	Wong Siew Ki		PH (DAP)	Death (traffic collision)
Sungai Kandis		4 August 2018 (2018-08-04)	Mat Shuhaimi Shafiei		PH (PKR)	Mohd Zawawi Ahmad Mughni		PH (PKR)	Death (lymphoma)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Paginatan	Sabah	Cancelled	Siringan Gubat		BN (UPKO)	—			Death (heart attack)
Apas			Tawfiq Abu Bakar Titingan		BN (UMNO)	—			Death (colon cancer)
Lepar	Pahang		Mohd. Shohaimi Jusoh			—			Death (diabetes)
Lenggeng	Negeri Sembilan		Ishak Ismail			—			Death (heart attack)
Nenggiri	Kelantan		Mat Yusoff Abd. Ghani			—			Declared vacant by the Speaker based on the Insolvency Department’s decision to declare him a bankrupt. However, SPR did not hold a by-election.
Tungku	Sabah		Mohd. Suhaili Said			—			Death (liver cancer)
Tanjong Datu	Sarawak	18 February 2017 (2017-02-18)	Adenan Satem		BN (PBB)	Jamilah Anu		BN (PBB)	Death (heart attack)
Sungai Air Tawar	Selangor	Cancelled	Kamarol Zaki Abdul Malik		BN (UMNO)	—			Death (heart attack)
Chempaka	Kelantan	22 March 2015 (2015-03-22)	Nik Abdul Aziz Nik Mat		PAS	Ahmad Fathan Mahmood		PAS	Death (prostate cancer)
Pengkalan Kubor	Kelantan	25 September 2014 (2014-09-25)	Noor Zahidi Omar		BN (UMNO)	Mat Razi Mat Ail		BN (UMNO)	Death (liver cancer)
Bukit Assek	Sarawak	Cancelled	Wong Ho Leng		DAP	—			Death (brain cancer)
Balingian		29 March 2014 (2014-03-29)	Abdul Taib Mahmud		BN (PBB)	Yussibnosh Balo		BN (PBB)	Resignation on appointment as Yang di-Pertua Negeri of Sarawak
Kajang	Selangor	23 March 2014 (2014-03-23)	Lee Chin Cheh		PKR	Wan Azizah Wan Ismail		PKR	Resignation (Kajang Move)
Sungai Limau	Kedah	4 November 2013 (2013-11-04)	Azizan Abdul Razak		PAS	Mohd Azam Abd Samat		PAS	Death (cardiac arrest)
Kuala Besut	Terengganu	24 July 2013 (2013-07-24)	A. Rahman Mokhtar		BN (UMNO)	Tengku Zaihan Che Ku Abd Rahman		BN (UMNO)	Death (lung cancer)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Lendu	Malacca	Cancelled	Idderris Kassim		BN (UMNO)	—			Death (colon cancer)
Bukit Gasing	Selangor		Edward Lee Poh Lin		DAP	—			Death (colon cancer)
Merlimau	Malacca	6 March 2011	Mohamad Hidhir Abu Hassan		BN (UMNO)	Roslan Ahmad		BN (UMNO)	Death (heart attack)
Kerdau	Pahang	6 March 2011	Zaharuddin Abu Kassim			Syed Ibrahim Syed Ahmad			Death (heart attack)
Tenang	Johor	30 January 2011	Sulaiman Taha			Mohd Azahar Ibrahim			Death (blood infection and diabetes)
Galas	Kelantan	4 November 2010	Che Hashim Sulaiman		PAS	Ab. Aziz Yusoff			Death (colon cancer)
Malim Nawar	Perak	Cancelled	Keshvinder Singh		BN (PPP)	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Pelabuhan Klang	Selangor		Badrul Hisham Abdullah		BN (UMNO)	—			Declared vacant by the Speaker due to long absence without the leave of the Speaker. However, SPR did not hold a by-election.
Kota Siputeh	Kedah		Abu Hasan Sarif			—
Bagan Pinang	Negeri Sembilan	11 October 2009	Azman Mohammad Noor			Mohd Isa Abdul Samad		BN (UMNO)	Death (sepsis)
Permatang Pasir	Penang	25 August 2009	Mohd Hamdan Abdul Rahman		PAS	Mohd Salleh Man		PAS	Death (heart attack)
Manek Urai	Kelantan	14 July 2009	Ismail Yaacob			Mohd Fauzi Abdullah			Death (heart attack)
Penanti	Penang	31 May 2009	Mohammad Fairus Khairuddin		PKR	Mansor Othman		PKR	Resignation
Bukit Selambau	Kedah	7 April 2009	Arumugam Vengatarakoo			Manikumar Subramaniam			Resignation
Batang Air	Sarawak		Dublin Unting Ingkot		BN (PRS)	Malcom Mussen Lamoh		BN (PRS)	Death (stroke)
Behrang	Perak	Cancelled	Jamaluddin Mohd. Radzi		Independent	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Jelapang			Hee Yit Foong		Independent	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Changkat Jering			Osman Mohd. Jailu		Independent	—			Declared vacant by the Speaker due to change of party allegiance. However, SPR did not hold a by-election.
Sanglang	Perlis		Abdullah Hassan		BN (UMNO)	Hashim Jasin		PAS	Election declared null and void. However, SPR did not hold a by-election.
Source:[1][2]

By-election	State	Date	Incumbent	Party		Winner	Party		Cause
Ijok	Selangor	28 April 2007	Sivalingam Arumugam Karuppiah		BN (MIC)	K. Parthiban		BN (MIC)	Death (heart attack)
Machap	Malacca	12 April 2007	Poh Ah Tiam		BN (MCA)	Lai Meng Chong		BN (MCA)	Death (renal failure due to lymphatic cancer)
Batu Talam	Pahang	28 January 2007	Tengku Paris Tengku Razlan		BN (UMNO)	Abdul Aziz Mat Kiram		BN (UMNO)	Death (colon cancer)
Pengkalan Pasir	Kelantan	6 December 2005	Wan Abdul Aziz Wan Jaafar		PAS	Hanafi Mamat			Death (liver cancer)
Ba'kelalan	Sarawak	18 September 2004	Judson Sakai Tugal		BN (SNAP)	Nelson Balang Rining		BN (SPDP)	Death (helicopter crash)
Kuala Berang	Terengganu	28 August 2004	Komaruddin Ab. Rahman		BN (UMNO)	Mohamad Zawawi Ismail		BN (UMNO)	Death (heart attack)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Anak Bukit	Kedah	18 July 2002	Fadzil Noor		PAS	Amiruddin Hamzah		PAS	Death (heart attack)
Ketari	Pahang	31 March 2002	Loke Koon Kam		BN (Gerakan)	Yum Ah Ha @ Yim Ah Ha		BN (Gerakan)	Death (jawbone cancer)
Indera Kayangan	Perlis	19 January 2002	Khor Lian Tee		BN (MCA)	Oui Ah Lan @ Ng Ah Lan		BN (MCA)	Death (colon cancer)
Likas	Sabah	21 July 2001	Yong Teck Lee		BN (SAPP)	Yong Teck Lee		BN (SAPP)	Election declared null and void
Lunas	Kedah	29 November 2000	M Joseph Philomin Joseph Fernandez		BN (MIC)	Saifuddin Nasution Ismail		KeADILan	Death (murder)
Sanggang	Pahang	1 April 2000	Abdullah Kia		BN (UMNO)	Redzwan Harun		BN (UMNO)	Death (stroke)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Pasir Tumboh	Kelantan	Cancelled	Daud Yusuf		PAS	—			Death
Jelawat		Cancelled	Mohd Daud Ja'afar		S46	—			Death
Sungai Bakap	Penang	8 November 1997	Ooi Theng Bok		BN (Gerakan)	Lai Chew Hock		BN (Gerakan)	Death (road accident)
Changkat Jering	Perak	8 November 1997	Mohamad Razlan Abdul Hamid		BN (UMNO)	Mat Isa Ismail		BN (UMNO)	Death (cancer)
Kidurong	Sarawak	25–26 October 1997	Wong Sing Ai		DAP	Michael Sim Kiam Hui		BN (SUPP)	Election declared null and void
Semerak	Kelantan	11 August 1997	Sulaiman Ahmad		PAS	Kamaruddin Mohd Nor		BN (UMNO)	Death (stroke)
Melekek	Malacca	14 June 1997	Mohd Zin Abdul Ghani		BN (UMNO)	Nawi Ahmad			Death (brain stroke due to diabetes)
Repah	Negeri Sembilan	29 May 1997	Lay Chun Tai @ Loy Chee Tai		BN (MCA)	Gan Chin Yap		BN (MCA)	Death
Permatang	Selangor	29 May 1997	Jamaluddin Adnan		BN (UMNO)	Abu Hassan Omar		BN (UMNO)	Resignation (to contest in a Kuala Selangor by-election)
Kemena	Sarawak	24–25 May 1997	Celestine Ujang Jilan		BN (PBB)	Celestine Ujang Jilan		BN (PBB)	Election declared null and void
Bukit Begunan	Sarawak	15–16 March 1997	Mong Dagang		BN (PBDS)	Mong Dagang		BN (PBDS)
Pulai Chondong	Kelantan	6 January 1997	Mohamad Noor Ahmad		S46	Zulkifli Mamat		PAS	Death
Bukit Asahan	Malacca	22 June 1996	Arunasalam Narayanan		BN (MIC)	R. Raghavan		BN (MIC)	Death (road accident)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Sulabayan	Sabah	28 January 1995	Sakaran Dandai		BN (UMNO)	Nasir Sakaran		BN (UMNO)	Resignation on appointment as Yang di-Pertua Negeri of Sabah
Shahbandar Raya	Selangor	28 May 1994	T. M. Thurai		BN (MIC)	S. S. Rajagopal		BN (MIC)	Death
Lundang	Kelantan	29 March 1994	Mawardi Ahmad		PAS	Mohamad Daud		PAS	Death
Sementa	Selangor	5 February 1994	Abdul Samat Harun		BN (UMNO)	Abdul Rahman Palil		BN (UMNO)	Death (heart attack)
Kampung Raja	Terengganu	13 October 1993	Abdullah Muhammad			Mohd Noor Hussin			Death (cancer)
Batu Talam	Pahang	28 August 1993	Mohamed Mazlan Idris			Syed Ali Syed Ahmad			Death (murder) see also: Mona Fandey
Batu Kawah	Sarawak	(22 August 1992)	Chong Kiun Kong		BN (SUPP)	Alfred Yap Chin Loi		BN (SUPP)	Death (heart attack)
Bukit Payung	Terengganu	21 April 1992	Baharuddin Mohd		PAS	Mazlan Awang		BN (UMNO)	Election declared null and void
Jerlun	Kedah	19 December 1991	Yusuf Abd. Rahman		BN (UMNO)	Khalid Ahmad			Death
Serkam	Malacca	14 December 1991	Arifin Baba			Mohd. Salleh Md. Ali			Death
Sungai Pinang	Kelantan	24 August 1991	Nordin Salleh		S46	Mahmud Yaakub		S46	Sought re-election upon change of party allegiance
Limbongan			Wan Mohd Najib Wan Mohamad			Samat Mamat
Prai	Penang	27 July 1991	Asamaley Sinniah		DAP	V. Muthusamy		BN (MIC)	Resignation
Usukan	Sabah	11 May 1991	Mustapha Harun		USNO	Mustapha Harun		BN (UMNO)	Sought re-election upon change of party allegiance
Bayu	Kedah	4 May 1991	Seroji Haron		BN (UMNO)	Mohd Sibi Ahmad			Death
Sulabayan	Sabah	8 December 1990	Sakaran Dandai		USNO	Nasir Sakaran		USNO	Resignation
Sipitang			Jawawi Isa		PBS	Jamilah Sulaiman		PBS	Death (colon cancer)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Kijal	Terengganu	1 August 1990	Mohamad Md Amin		BN (UMNO)	Ahmad Said		BN (UMNO)	Death (liver cancer)
Kuala Linggi	Malacca	29 July 1990	Bahari Hasan			Ibrahim Durum			Death
Pantai Merdeka	Kedah	24 March 1990	Ghazali Bakar			Shuaib Lazim			Death
Ranau	Sabah	9 December 1989	Mark Koding		PBS	Siringan Gubat		PBS	Sought re-election upon change of party allegiance
Sungai Besar	Selangor	1 November 1989	Abu Samah Nordin		BN (UMNO)	Mahbud Hashim		BN (UMNO)	Death
Teruntum	Pahang	12 August 1989	Lim Ah Lek		BN (MCA)	Kan Tong Leong		BN (MCA)	Resignation (to contest in a Bentong by-election)
Tambatan	Johor	5 August 1989	Mahmood Daud		BN (UMNO)	A. Kadir Annuar		BN (UMNO)	Death
Teluk Pasu	Terengganu	24 June 1989	Ismail Yusof			Harun Taib		PAS	Death
Parit Raja	Johor	20 October 1988	Syed Zain Idrus			Mohd. Yasin Kamari		BN (UMNO)	Death
Tanjong Puteri		5 March 1988	Md Yunos Sulaiman			Md Yunos Sulaiman			Election declared null and void
Bongawan	Sabah	19 September 1987	Abd Karim Abdul Ghani		USNO	Abdul Ghani Bidin		PBS	Resignation
Bukit Tuku	Kelantan	28 June 1987	Zakaria Botok		BN (UMNO)	Mohamed Zain Ismail		BN (UMNO)	Death
Usukan	Sabah	18 April 1987	Abdul Hamid Mustapha		USNO	Mustapha Harun		USNO	Death (heart attack)
Sulaman		30 November 1986	Osu Sukam			Jasni Gindug		PBS	Resignation

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Oya	Sarawak	2 July 1986	Salleh Jafaruddin		BN (PBB)	Wan Madzihi Wan Madzhar		BN (PBB)	Sought re-election upon change of party allegiance
Karamunting	Sabah	25 January 1986	Lau Pui Keong		BERJAYA	Lau Pui Keong		PBS
Buang Sayang			Othman Mohamed Yassin		USNO	Osu Sukam		USNO
Balung			Ahmad Bahrom Abu Bakar Titingan		BERJAYA	Ahmad Bahrom Abu Bakar Titingan		PBS
Sukau		24–25 January 1986	Saman Gulam		USNO	Zaki Gusmiah		USNO
Bandar Maran	Pahang	4 January 1986	Abdul Jalil Mohammad Seh		BN (UMNO)	Ayub Teh		BN (UMNO)	Death
Tambunan	Sabah	29 December 1984	Joseph Pairin Kitingan		BERJAYA	Joseph Pairin Kitingan		Independent	Sought re-election upon change of party allegiance
Rungkup	Perak	3 December 1983	Mohamed Yaacob Mohamed		BN (UMNO)	Mohamed Jamrah		BN (UMNO)	Death (heart attack)
Selising	Kelantan	8 September 1983	Abdul Rahman Ahmad		PAS	Wan Mohamed Wan Abu Bakar			Election declared null and void
Kemumin			Che Hassan Che Ishak		PAS	Umar Ibrahim		BN (BERJASA)
Tamparuli	Sabah	16 July 1983	James Ongkili		BERJAYA	Clarence E. Mansul		BERJAYA	Resignation
Bandar Raub	Pahang	4 June 1983	Tan Liew Thong		BN (MCA)	Lip Tuck Chee		DAP	Death
Kenering	Perak	9 April 1983	Wan Mohamed Wan Teh		BN (UMNO)	Johan Lahamat		BN (UMNO)	Resignation
Banggi	Sabah	(28 January 1983)	Abdul Salam Harun		USNO	Yahya Othman		BERJAYA	Disqualification (being declared a bankrupt)
Binjai	Terengganu	9 November 1982	Mohamed Nor Ali		BN (UMNO)	Muda Mamat		BN (UMNO)	Death
Kepayang	Perak	16 October 1982	Lim Cho Hock		DAP	Lau Dak Kee		DAP	Resignation
Usukan	Sabah	1 October 1982	Mohamed Said Keruak		USNO	Pandikar Amin Mulia		USNO
Tandek			Dason Suran Gaban		BERJAYA	Villson Malingka		BERJAYA
Batang Ai	Sarawak		David Jemut		BN (SNAP)	Mikai Mandau		Independent
Gemencheh	Negeri Sembilan	22 May 1982	Mohamad Taha Talib		BN (UMNO)	Waad Mansor		BN (UMNO)	The election was postponed after the murder of incumbent.

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Lumadan	Sabah	8 November 1981	Mohamed Dun Banir		BERJAYA	Johari Mohamed Dun		BERJAYA	Resignation
Kunak			Abdul Hamid Mustapha			Salim Bacho		USNO
Balung			S. Abas S. Ali			Ahmad Bahrom Abu Bakar Titingan		BERJAYA
Ulu Muar	Negeri Sembilan	(17 September 1981)	Abdul Kadir Abdullah		BN (UMNO)	Ali Manaf		BN (UMNO)	Death
Satok	Sarawak	23 May 1981	Abang Abu Bakar Abang Mustapha		BN (PBB)	Abang Abdul Rahman Zohari Abang Openg		BN (PBB)	Resignation (to contest in Paloh federal by-election)
Matu-Daro		22–23 May 1981	Abdul Rahman Ya'kub						Resignation (to accept the position of Yang di-Pertua Negeri of Sarawak)
Bengkoka	Sabah	25–29 April 1981	Abdul Salam Harun		USNO	Jasni Piut		BERJAYA	The election was postponed because of the death of one of the candidates.
Sebandi	Sarawak	(25 March 1981)	Sharifah Mordiah Tuanku Fauzi		BN (PBB)	Abdul Taib Mahmud		BN (PBB)	Resignation
Pengkalan Kota	Penang	15 November 1980	Chooi Yew Choy		Independent	Lim Kean Siew		BN (MCA)	Death
Sugut	Sabah	21 May 1980	Betua Abbah		USNO	Pengiran Khalid Pengiran Salleh		BERJAYA	Resignation
Kemabong			Albert Chew Ah Nyuk		BERJAYA	Justin Sanggau
Bukit Raya	Kedah	5 April 1980	Ismail @ Shafie Kassim		PAS	Safirol Hashim		BN (UMNO)	Death
Oya	Sarawak	(28 January 1980)	Edwin Esnen Unang		BN (PBB)	Salleh Jafaruddin		BN (PBB)	Resignation (to contest in a Mukah by-election)
Ranau	Sabah	23–24 November 1979	Amin Jahali		USNO	Jirin Salium		BERJAYA	Resignation
Balung			Abu Bakar Titingan			S. Abas S. Ali			Resignation
Kuala Besut	Terengganu	30 July 1979	Zakaria Muda		BN (UMNO)	Wan Zakaria Wan Abdul Rahman		BN (UMNO)	Death (long illness)
Kuching Timor	Sarawak	17 March 1979	Lo Foot Kee		SNAP	Chua Kock Meng		Independent	Death
Muara Tuang		20 January 1979	Mohamad Musa		BN (PBB)	Adenan Satem		BN (PBB)	Death
Kampong Kolam	Penang	9 December 1978	Ooi Ean Kwong		DAP	Ooi Ean Kwong		DAP	Election declared null and void
Machan	Sarawak	16 September 1978	Leo Moggie Irok		BN (SNAP)	Gramong Juna		BN (SNAP)	Resignation
Titi Tinggi	Perlis	19 August 1978	Leong Choon Ling		BN (MCA)	Ng Eng Toon @ Goh Eng Toon		BN (MCA)	Death
Kampong Jawa	Selangor	29 July 1978	Raja Zulkifli Raja Borhan		BN (UMNO)	Raja Zulkifli Raja Borhan		BN (UMNO)	The election was postponed after all the four candidates were disqualified in the nomination day.
Inanam	Sabah		Clarence E. Mansul		BERJAYA	Marcel Leiking		BERJAYA	Resignation
Matunggong		26–29 July 1978	Amil Matinggi			George Mojuntin			Resignation

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Tendong	Kelantan	10 June 1978	Mohamad Nasir		BERJASA	Ghazali Awang Ibrahim		BERJASA	Resignation
Morib	Selangor	6 May 1978	Harun Idris		BN (UMNO)	Ishak Pangat @ Shafaat		BN (UMNO)	Disqualification (found guilty of corruption)
Jempol	Negeri Sembilan	31 December 1977	Mohamed Yassin Othman			Jaafar Harun			Death
Matunggong	Sabah	(20 December 1977)	Michael Francis Wong		BERJAYA	Amil Matinggi		BERJAYA	Resignation
Kenering	Perak	19 November 1977	Mohamed Ghazali Jawi		BN (UMNO)	Tajol Rosli Mohd Ghazali		BN (UMNO)	Resignation
Parit Jawa	Johor	5 November 1977	Mohamed Zain Maidin			Shahadan Sabtu			Death (road accident)
Bertam	Penang	(16 June 1977)	Ahmad Abdullah			Abdul Rahman Abbas			Death
Balingian	Sarawak	9–11 June 1977	Salleh Jafaruddin		BN (PBB)	Wan Habib Syed Mahmud		BN (PBB)	Resignation on appointment as Senator
Bandar Penggaram	Johor	5 February 1977	Tan Siew Yong		BN (MCA)	Lim Tong Keng		BN (MCA)	Death
Tanjong Aru	Sabah	31 July 1976	Darius Binion		BERJAYA	Matthew Gonzaga		BERJAYA	Death (Double Six Crash)
Moyog			Peter Mojuntin			Conrad Mojuntin
Papar			Salleh Sulong			Mohamed Noor Mansor
Kota Kinabalu			Chong Thien Vun			Lim Guan Sing
Kiulu		(15 July 1976)	Fuad Stephens			Rahimah Stephens
Semariang	Sarawak	July 1976	Ajibah Abol		BN (PBB)	Hafsah Harun		BN (PBB)	Death
Lunas	Kedah	13 June 1976	Soon Cheng Leong		BN (MCA)	Lim Wan Ming		BN (MCA)	Death
Labuan	Sabah	8–10 December 1975	Harris Salleh		BERJAYA	Mohammed Omar Beldram		USNO	Resignation
Kuala Kinabatangan			Salleh Sulong			Pengiran Galpam Pengiran Indar
Merbok	Kedah	15 April 1975	Mansor Akil		BN (UMNO)			BN (UMNO)	Death
Alor Pongsu	Perak	18 December 1974	Masud Untoi			Mohamed Abbas			Death

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Parit Bakar	Johor	15 June 1974	Abdul Aziz Ishak		Alliance (UMNO)	Mohamed Zin Maidin		Alliance (UMNO)	Death
Sungei Bahru	Malacca	18 May 1974	Abdullah Samad			Johari Yusof			Death
Bandar Kangar	Perlis	6 April 1974	Quah Chooi Tong		Alliance (MCA)	Tan Thean Choo		Alliance (MCA)	Death
Pasir Puteh Tengah	Kelantan	9 March 1974	Muhammad Ismail		Alliance (UMNO)	Raja Mahmud Raja Mamat		Alliance (UMNO)	Death
Engkilili-Skrang	Sarawak	(January 1974)	Simon Dembab Maja		PESAKA	Alfred Jabu Numpang		PESAKA	Resignation
Kuching Barat		15 December 1973	Shahbuddin Cheng Yew Kiew		Alliance (SCA)	Abang Abu Bakar Abang Mustapha		Alliance (BUMIPUTERA)	Resignation
Kuala Nerus	Terengganu	17 November 1973	Ibrahim Fikri Mohamed		Alliance (UMNO)	Abdul Rashid Ngah		Alliance (UMNO)	Death
Kajang	Selangor	3 November 1973	Mohd. Nazir Abdul Jalil			Mohamed Azmir Mohamed Nazir			Death
Johore Lama	Johor	22 October 1973	Ismail Sa'adon			Mohamed Yusoff Jani			Death
Elopura	Sabah	(4 August 1973)	Ngui Tet Min		Alliance (SCA)	Ngui Tet Loi		Alliance (SCA)	Death (helicopter crash)
Kota Bharu Tengah	Kelantan	10 February 1973	Mohamad Asri Muda		PAS	Salahuddin Abdullah		PAS	Resignation
Sebandi	Sarawak	27 January 1973	Ikhwan Zainei		Alliance (BUMIPUTERA)	Sulaiman Daud		Alliance (BUMIPUTERA)	Resignation
Tumpat Barat	Kelantan	26 February 1972	Wan Salleh @ Wan Abdullah Wan Sulaiman		PAS	Ismail Cik Ali		PAS	Death
Muda	Penang	11 December 1971	Ismail Che Chik		Alliance (UMNO)	Abdul Kadir Hassan		Alliance (UMNO)	Resignation
Sidam	Kedah	21 August 1971	Hanafi Mohd. Yunus			Yassin Ibrahim			Death
Batu Rakit	Terengganu		Mansor Mohamed			Nik Hassan Abdul Rahman			Resignation
Pelagus	Sarawak	8–17 July 1971	Bennet Jarrow		PESAKA	Leonard Linggi Jugah		PESAKA	Death
Yen-Merbok	Kedah	22 May 1971	Lebai Ismail Abdul Wahab		Alliance (UMNO)	Abdullah Ismail Affendi		Alliance (UMNO)	Death
Bekok	Johor	15 May 1971	Sim Kim Chong @ Siew Ah See		Alliance (MCA)	Ng Nam Seng		Alliance (MCA)	Death

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Serdang	Selangor	28 December 1968	Chin Kek Kum		Socialist Front (Ra'ayat)	Thuan Paik Phok		Alliance (MCA)	Resignation
Pendang	Kedah	30 November 1968	Syed Ibrahim Syed Kechik		Alliance (UMNO)	Abdul Manaf Abdullah		Alliance (UMNO)	Death
Bukit Serampang	Johor	7 September 1968	Hassan Yunus			Abdul Rahman Mahmud			Death
Ranau	Sabah	(12 June 1968)	Ganie Gilong		UPKO	Mohamed Yassin Hashim		USNO	Resignation
Bachok Utara	Kelantan	6 April 1968	Shafie Ahmad		PAS	Mohamad Nor Ismail		PAS	Death (stroke)
Baling Barat	Kedah	27 January 1968	Syed Omar Syed Abdullah Shahabudin		Alliance (UMNO)	Mohammad Zain Yusoff		Alliance (UMNO)	Death
Tampoi	Johor	30 September 1967	Daud Ahmad			Elias Udin			Death
Kampong Bharu	Selangor	7 January 1967	Abdullah Yassin			Razali Mohamed Ali			Death
Sungei Bahru	Malacca	19 March 1966	Tamby Chik Abdul Karim			Abdullah Samad			Death
Rahang	Negeri Sembilan	11 December 1965	Han Hiu Fong		Alliance (MCA)	Chen Man Hin		Independent	Death
Ayer Itam	Penang	6 November 1965	Chor Sin Kheng			Lim Kean Siew		Socialist Front (Labour)	Death
Jitra	Kedah	19 August 1965	Omar Salleh		Alliance (UMNO)	Mohamed Zain Ahmad		Alliance (UMNO)	Death
Hong Lim	Singapore	10 July 1965	Ong Eng Guan		UPP	Lee Khoon Choy		PAP	Resignation
Tumpat Tengah	Kelantan	10 October 1964	Mahmood Mat Amin		Alliance (UMNO)	Lat Kassim		Alliance (UMNO)	Death
Jelai	Pahang	26 September 1964	Muhammad Nor Sulaiman			Abu Samah Idris			Death (road accident)

By-election	State Assembly	Date	Incumbent	Party		Winner	Party		Cause
Balik Pulau	Penang	14 December 1963	Mohamed Hassan Kassim		Alliance (UMNO)	Ahmad Mohamed Taib		Alliance (UMNO)	Death
Establishment of Malaysia Successor to Federation of Malaya, North Borneo, Sarawak, Singapore
Telok Datoh	Selangor	7 September 1963	Raja Ismail Raja Ibrahim		Alliance (UMNO)	Hormat Rafei		Alliance (UMNO)	Death
Pahang Tua	Pahang	30 March 1963	Ahmad Othman			Mohammed Moktar Daud			Death
Port Swettenham	Selangor	12 January 1963	Abdullah Hassan			Adnan Chik			Death
Rantau Panjang	Kelantan	2 June 1962	Abdul Rahman Daud		PMIP	Ahmad Yatim		PMIP	Death
Gemas	Negeri Sembilan	3 February 1962	Fong Yew Wang		Alliance (MCA)	Goh Boh Tah		Alliance (MCA)	Death (long illness)
Pontian Kechil	Johor	24 June 1961	Abdullah Mohsin		Alliance (UMNO)	Abdul Rahman Mohammed Amin		Alliance (UMNO)	Death
Kota Tengah	Malacca	29 December 1960	Goh Chee Yan		Alliance (MCA)	Khoo Chua Seng		Alliance (MCA)	Death
Grik	Perak	8 June 1960	Mohamed Ghazali Jawi		Alliance (UMNO)	Din Jusoh		Alliance (UMNO)	Resignation on appointment as Malaya's ambassador in Cairo
Sri Lalang	Johor	22 May 1960	Cheong Soo Kheng		Alliance (MCA)	Ong Kai Beng		Alliance (MCA)	Death
Plentong		23 November 1959	Mohamad Noah Omar		Alliance (UMNO)	Fatimah Abdul Majid		Alliance (UMNO)	Resignation on appointment as Speaker of the Dewan Rakyat

By-election	State	Date	Incumbent	Party		Winner	Party		Cause
Batu Pahat Central	Johor	(24 October 1957)	S. Chelvasingam MacIntyre		Alliance (MIC)	Syed Mustapha Akil		Alliance (UMNO)	Resignation on appointment as Malayan High Commissioner to India
Larut South-Matang	Perak	26 October 1957	Mohamed Ghazali Jawi		Alliance (UMNO)	Wan Othman Wan Omar			Resignation on appointment as Menteri Besar of Perak
Kluang	Johor	10 November 1955	Sardon Jubir			Syed Mohamed Edros			Resignation
Johore Bahru Central			Sulaiman Abdul Rahman			Syed Nasir Ismail			Resignation